Navigation Links
Buckyballs could keep water systems flowing
Date:3/5/2009

DURHAM, N.C. Microscopic particles of carbon known as buckyballs may be able to keep the nation's water pipes clear in the same way clot-busting drugs prevent arteries from clogging up.

Engineers at Duke University have found that buckyballs hinder the ability of bacteria and other microorganisms to accumulate on the membranes used to filter water in treatment plants. This attribute leads the researchers to believe that coating pipes and membranes with these nanoparticles may prove to be an effective strategy for addressing one of the major problems and costs of treating water.

"Just as plaque can build up inside arteries and reduce the flow of blood, bacteria and other microorganisms can over time attach and accumulate on water treatment membranes and along water pipes," said So-Ryong Chae, post-doctoral fellow in Duke's environmental and civil engineering department. The results of his experiments were published March 5, 2009 in the Journal of Membrane Sciences.

"As the bacteria build up on these surfaces, they attract other organic matter, creating a biofilm that slowly builds up over time," Chae continued, "The results of our experiments in the laboratory indicate that buckyballs may be able to prevent this clogging, known as biofouling. The only other options to address biofouling are digging up the pipes and replacing the membranes, which can be expensive and inconvenient."

A buckyball, or C60, is one shape within the family of tiny carbon shapes known as fullerenes. They are named after Richard Buckminster Fuller, the inventor of the geodesic dome, since their shape resembles his famous structure.

"Biofouling is viewed as one of the biggest costs associated with membrane-based water treatment systems," said Claudia Gunsch, assistant professor of civil engineering at Duke's Pratt School of Engineering and senior member of the research team. "These membranes have very small pores, so they can get stopped up quickly. If we could increase the time between membrane replacements by 50 percent, for example, that would be a huge cost savings."

According to Chae, the addition of buckyballs to treatment membranes had a two-fold effect. First, treated membranes showed less bacterial attachment than non-treated membranes. After three days, the membranes treated with buckyballs had on average 20 colony forming units, the method by which bacterial colonies are counted.

"In contrast, the number of bacterial colonies on the untreated membrane was too numerous to count," Chae said.

Chae also found that the presence of the buckyballs inhibited respiration, or the ability of the bacteria to use oxygen to fuel its activities.

"As the concentration of buckyballs increased, so did the inhibition of respiration," Chae said. "This respiratory inhibition and anti-attachment suggests that this nanoparticle may be useful as an anti-fouling agent to prevent the biofouling of membranes or other surfaces."

Gunsch said the mechanisms involved are not well-understood.

Both Gunsch and Chae believe that since buckyballs are one of the most widely used nanoparticles, additional research is needed to determine if they have any detrimental effects on the environment or to humans. This is one of many issues being studied at Duke's Center for Environmental Implications of Nanotechnology.

"We need to figure out how resistant these coatings will be to long-term use," Gunsch said. "If they can indeed prevent fouling, they will last longer. If they slough off over time, we need to know what the effects will be."

The current experiments in the laboratory were conducted with Escherichia coli K12, a strain of the bacteria that is widely used in laboratory experiments.

"We focused on a quite specific microorganism, so the next stage of our research will to see if these nanoparticles will have the same effects on bacteria commonly found in the environment or those in mixed microbial communities," Chae said. "We also plan to build a small-scale version of a treatment plant in the lab to conduct these tests."


'/>"/>

Contact: Richard Merritt
richard.merritt@duke.edu
919-660-8414
Duke University
Source:Eurekalert  

Related biology technology :

1. How buckyballs hurt cells
2. Video shows buckyballs form by shrink wrapping
3. MIT: Nanostitching could strengthen airplane skins, more
4. Genetic discovery could lead to advances in dental treatment
5. Cheaper materials could be key to low-cost solar cells
6. NPL research shows there could be no end in sight for Moore’s Law
7. Michigan Company Founded upon What Could Be History's Most Important Breakthrough in AI and Robotics
8. Cold atoms could replace hot gallium in focused ion beams
9. Could Database Software Help Cure Alzheimers and Save the Earth?
10. A new material could act as a nanofridge for microchips
11. New knowledge about thermoelectric materials could give better energy efficiency
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Buckyballs could keep water systems flowing
(Date:2/10/2016)... ... February 10, 2016 , ... HOLLOWAY AMERICA, a ... Engineering (ISPE) Rocky Mountain Chapter 21st Annual Vendor Exhibition on Thursday, February 18, ... 100 tables for its annual event, which will run from 3:00 p.m. - ...
(Date:2/10/2016)... ... February 10, 2016 , ... SonaCare ... training and support program, Sonalink™ remote monitoring. The inaugural launch of this new ... February 5th, connecting Dr. Samuel Peretsman to a HIFU technical expert at SonaCare ...
(Date:2/10/2016)... ... February 10, 2016 , ... Curoverse announced today that the ... provides capabilities for managing and processing genomic and health data at petabyte scale. ... collecting and analyzing genomic data,” said Adam Berrey chief executive officer at Curoverse. ...
(Date:2/10/2016)... La Jolla CA (PRWEB) , ... February 10, 2016 , ... ... of new agents for the treatment of Alzheimer’s disease, announced today it has been ... to February 18th at the Breakers in Palm Beach, Florida. The purpose of ...
Breaking Biology Technology:
(Date:2/9/2016)... , Feb. 9, 2016 Vigilant Solutions announces today ... reader (LPR) to develop a lead in a difficult homicide ... LPR data to locate the suspect vehicle. Due to the ... case have been omitted at the agency,s request. ... agency explains, "Our victim was found deceased at an intersection ...
(Date:2/4/2016)... Feb. 4, 2016 The field of ... of the most popular hubs of the biotechnology ... other huge studies of human microbiota, have garnered ... years, the microbiome space has literally exploded in ... This report focuses on biomedical aspects of ...
(Date:2/3/2016)... , Feb. 3, 2016 Vigilant Solutions announces ... Department in Missouri solved two ... reader (LPR) data from Vigilant Solutions. Brian ... in which the victim was walking out of a convenience store and witnessed ... next to his vehicle, striking his vehicle and leaving ...
Breaking Biology News(10 mins):